Week 6

Confidence Intervals and Hypothesis Testing

Overview of Week 6

Mon: Day 9

• Confidence intervals for one mean (single-sample):
  • Sections 4.2 and 5.1.1, 5.1.2 (pgs. 238-242)
• Student’s t-distribution

Wed: Day 10

• Hypothesis testing for one mean (single-sample): Section 4.3, 5.1
• CIs vs. hypothesis tests
• Inference for two-sample paired data: Section 5.2
• R projects, here::here(), and loading data into R from a file
  • See Projects in RStudio file for more information
• Running a t.test in R

Slides & Recordings

• Pre-recorded lessons are on Echo Cloud (aka echo 360 or echo video).

Day	Topic	Slides: html	Slides: pdf	Slides: web-page	Slides with notes	Recording Link	Duration	Code: qmd	Code: html
9	CI’s for 1 mean: 4.2	Day 9: slides 1-12				Day 9 Part 1	17 min
	4.2 con’td	Day 9: slides 13-19	same		same	Day 9 Part 2	17 min	same	same
	4.2 con’td, 5.1.1, 5.1.2 (pgs. 238-242)	Day 9: slides 20-23	same		same	Day 9 Part 3	14 min	same	same
10 part 1	Hyp test 1 mean intro	Day 10 Part 1: slides 1-13				Day 10 Part 1	26 min
	Hyp test steps: 4.3, 5.1	Day 10 Part 1: slides 14-25	same		same	Day 10 Part 2	36 min	same
	R demo	Day 10 Part 1: slides 26-34	same		same	Day 10 Part 3	25 min	same
10 part 2		Day 10 Part 2				No recording

Datasets

All datasets can be found on GitHub

• BodyTemperatures.csv
• chol213.csv

Class discussion

During class you will be working in groups discussing the following:

Day 9

• Slide 15: What percent CI was being simulated in this figure?
• Slide 22: Calculate CI
• Problems from Homework 4:
  • Book exercises:
    • warm-up: 4.4, 4.6, 5.10
    • 5.6
  • R2: Youth weights Part 2 (YRBSS)

Day 10

• Work through Day 10 Part 2 slides
  • There are specific questions in orange on (most) slides.
• Problems from Homework 4:
  • Book exercises:
    • 5.16 (warm-up)
    • 5.12
  • R3: Swim times

Homework

• HW 4 covers Days 8 -10 and is due on Sat, 11/9
• Check out this spreadsheet for typos in book.